If you take to something like a duck to water, it means that you discover when you start doing a new activity for the first time, you are very good at it.
He took to golf like a duck to water. He'd never played before but hit a hole in one!
Kate never seemed like the mothering type but when her daughter was born she took to it like a duck to water. She was a real natural!
Don't confuse it with
A sitting duck. If someone is a sitting duck, it means they are an easy target.
The soldiers were left exposed on the hill. They really were sitting ducks for the enemy.
China's Ye Shiwen stormed to gold and set a new world record in the women's 400m medley with a time of 4 minutes 28.43 seconds at the Aquatics Centre. The 16-year-old took a second off Australian defending champion Stephanie Rice's record set at Beijing 2008.